Ababi Sharon on thu 16 nov 00
Turquoise Turquoise Turquoise. I had a nice Turquoise glaze, could not pass
it, was not mine. Except the beauty was terrible, runny, sticks to the
shelves, based on A LOT of soda Bicarbonate, means, a very mean glaze. I
made many tests, to get a nice low fire Turquoise, without using of lithium
carbonate.This glaze, at my studio is mainly for my students mostly
children. I am know, from earlier tests, that glazes with A LOT of sodium,
leach, and get kind of white spots. The last test, I made last week, was
very easy, yes, after many testings, and getting some experience. I will
write
it here, first with "my local" European frits, than with a converting to
N.A. (North American) materials. The way my result was, through Insight, I
suggest to add some C.M.C. . I believe, you can make this glaze it a
different way, using one of the G.B. substitutes.
Turquoise 1/ Ababi
==========
FRIT 6004........... 34.6 34.64%
FRIT 2120........... 34.6 34.64%
WHITING............. 13.9 13.86%
BALL CLAY........... 13.9 13.86%
COPPER OXIDE........ 3.0 3.00%
========
100.0
CaO 0.39* 9.95%w 12.76%m
MgO 0.00* 0.03%w 0.05%m
K2O 0.13* 5.49%w 4.20%m
Na2O 0.48* 13.60%w 15.79%m
TiO2 0.01 0.21%w 0.19%m
Al2O3 0.14 6.57%w 4.64%m
B2O3 0.28 8.84%w 9.14%m
SiO2 1.62 44.42%w 53.19%m
Fe2O3 0.00 0.11%w 0.05%m
Cost/kg 13.54
L.O.I. 10.78
Si:Al 11.47
SiB:Al 13.44
Expan 12.15
Notes:
Very nice at 1100C where thicker small delicat crackles.
Should be 4 copper oxide for stronger turquoise
******************************************
Turquoise 1 /Ababi
==================
WHITING............. 1.1 1.10%
3110................ 39.9 39.93%
3134................ 32.0 31.97%
CRYOLITE............ 22.1 22.09%
ALUMINA HYDRATE..... 1.9 1.91%
COPPER OXIDE........ 3.0 3.00%
========
100.0
CaO 0.39* 9.56%w 12.80%m
K2O 0.02* 0.92%w 0.74%m
Na2O 0.59* 15.91%w 19.28%m
Al2O3 0.14 6.30%w 4.64%m
B2O3 0.28 8.42%w 9.09%m
SiO2 1.63 42.74%w 53.45%m
Cost/kg 24.99
L.O.I. 16.16
Si:Al 11.52
SiB:Al 13.47
Expan 11.96
I meant to fire it to 1060C, but the firing was to 1100C, means, at the
moment this is a ^03 glaze
Good Turquoiseing!
Ababi Sharon
ababisharon@hotmail.com
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/index.html
* * * * * * * *
www.photoisland.com
ID: sharon@shoval.org.il
Password:clay
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